Underground coal mine power system harmonic detection and suppression system design based on adjustable Q factor

Aiming at the problem of harmonic disturbance to power system in coal mine, and also consuming more reactive power, at the same time, based on the instantaneous reactive power theory of harmonic detection method in three-phase four-wire circuit application limitations, the use of adjustable Q-factor wavelet transform to improve the instantaneous reactive power theory of total harmonic content detection. Using MATLAB/SIMULINK to create three-phase four-wire system active filter simulation model, it is applied to the harmonic detection module of the active filter, set the corresponding simulation parameters, according to the simulation results analysis of the active filter harmonic suppression effect, a good improvement of the coal mine power quality.